Smoth screen changes. Step 1

lib/screens/splash.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 
+import 'package:checker/base/base_screen.dart';
 import 'package:checker/base/base_state.dart';
 import 'package:checker/common.dart';
 import 'package:checker/consts.dart';
@@ -8,91 +9,37 @@ import 'package:checker/db.dart';
 import 'package:checker/network.dart';
 import 'package:checker/resources.dart';
 import 'package:checker/screens/finish_registration.dart';
+import 'package:checker/screens/purchase.dart';
 import 'package:checker/screens/registration.dart';
+import 'package:checker/screens/settings.dart';
 import 'package:checker/strings.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:http/http.dart';
 
-class SplashScreen extends StatefulWidget {
+class SplashScreen extends BaseScreen {
+
+  SplashScreen(SqliteHelper helper, String app) : super(helper, app);
+
   @override
-  State createState() => new _SplashScreenState();
+  State createState() => new _SplashScreenState(helper, app);
 }
 
 class _SplashScreenState extends BaseState<SplashScreen> {
+
+  _SplashScreenState(SqliteHelper helper, String app) : super(helper, app);
+
   @override
   Widget build(BuildContext ctx) {
-    if (helper == null) {
-      helper = new SqliteHelper();
-      helper.open().then((_) {
-        if (app == null) {
-          platform.invokeMethod('getFlavor').then((flavor) {
-            app = flavor;
-            setState(() {
-              onStart();
-            });
-          });
-        }
-      });
-    }
-    return getScreenContent();
-  }
-
-  void onStart() {
-    helper.getLocale().then((locale) {
-      if (locale == null) {
-        initWithSystemValue();
-      } else {
-        initWithSavedValue(locale);
-      }
-    });
-  }
-
-  void initWithSystemValue() {
-    platform.invokeMethod('getLocale').then((locale) {
-      helper.getSettings(false).then((settings) {
-        if (settings == null) {
-          createSettingsTable(locale);
-        } else {
-          initLocale(locale, () {
-            showNext();
-          });
-        }
-      });
-    });
-  }
-
-  void initWithSavedValue(String locale) {
-    initLocale(locale, () {
-      showNext();
-    });
-  }
-
-  void createSettingsTable(String locale) {
-    platform.invokeMethod('getCurrency').then((currency) {
-      helper.createAppInfo(currency);
-      initLocale(locale, () {
-        showNext();
-      });
-    });
-  }
-
-  void initLocale<T>(String locale, Future<T> onValue()) {
-    StringsLocalization.load(locale).then((_) {
-      onValue();
-    });
-  }
-
-  void showNext() {
     new Future.delayed(const Duration(milliseconds: 1000), () {
       showNextScreen();
     });
+    return getScreenContent();
   }
 
   @override
   Widget getScreenContent() {
-    return app == null
-        ? getBackground()
-        : new Stack(children: <Widget>[
+    return new Stack(children: <Widget>[
             getBackground(),
             getLogo(),
             new Align(
@@ -148,7 +95,9 @@ class _SplashScreenState extends BaseState<SplashScreen> {
       bool active = status['active'] == null ? false : status['active'];
 
       if (active) {
-        startScanner(context, app, helper);
+        helper.getToken().then((token) {
+          _initAndStartScanner(context, app, token, helper);
+        });
       } else {
         if (await platform.invokeMethod('isOnline')) {
           _createToken(helper);
@@ -193,4 +142,101 @@ class _SplashScreenState extends BaseState<SplashScreen> {
       });
     });
   }
+
+
+  /// Запуск спецефичной для каждой платформы части приложения - сканера.
+  /// Может производиться с нескольких экранов (splash, finish_registration).
+  _initAndStartScanner(BuildContext context, String app, String token,
+    SqliteHelper helper) {
+    // Канал ловит вызовы методов из "нативной" части приложения.
+    // Могут быть вызваны либо exit либо faq, либо purchase.
+    platform.setMethodCallHandler((MethodCall call) {
+      if (call.method == 'findUser') {
+        String cardPhone = call.arguments[0];
+        var userResponse = getUser(call.arguments[1], cardPhone, token);
+
+        if (userResponse != null) {
+          userResponse.then((response) {
+            List<Map> users;
+
+            try {
+              users = JSON.decode(response.body);
+            } catch (error) {
+              print(error);
+            }
+
+            if (users.length > 0) {
+              return users[0];
+            } else {
+              throw new FlutterError("Users not found");
+            }
+          });
+        }
+      } else if (call.method == 'faq') {
+        faq(helper, app, context, true);
+      } else if (call.method == 'settings') {
+        pushRoute(context, new SettingsScreen(helper, app, true));
+      } else {
+        String userString;
+
+        if (call.arguments[0] is String) {
+          userString = call.arguments[0];
+        } else {
+          userString = JSON.encode(call.arguments[0]);
+        }
+
+        print(userString);
+
+        String card = call.arguments[1];
+        print('$userString, $card');
+
+        new Future.delayed(const Duration(milliseconds: 200), () {
+          var route = new MaterialPageRoute<bool>(
+            builder: (BuildContext context) => new PurchaseScreen(helper, app, userString, card),
+            fullscreenDialog: true);
+          Navigator.of(context).push(route).then((b) {
+            if (b) {
+              setState(() {
+                print('restart scanner!');
+              });
+            }
+          });
+        });
+      }
+    });
+
+    platform.invokeMethod('getEndpoint').then((url) {
+      platform.invokeMethod('getAppToken').then((appToken) {
+        Map<String, String> args = StringsLocalization.strings;
+        args['token'] = token;
+        args['url'] = url;
+        args['appToken'] = appToken;
+        args['localeCode'] = StringsLocalization.localeCode;
+        args['color'] = Resources
+          .getPrimaryColor(app)
+          .value
+          .toString();
+        platform.invokeMethod('startScanner', args);
+      });
+    });
+  }
+
+  Future<Response> getUser(String type, String cardPhone, String token) {
+    try {
+      switch (type) {
+        case 'card':
+          return getUserByCard(cardPhone, token);
+          break;
+        case 'phone':
+          return getUserByPhone(cardPhone, token);
+          break;
+        default:
+          return null;
+      }
+    } catch (error) {
+      print(error.toString());
+      return null;
+    }
+  }
 }
+